body{
    background-image: url(../img/98451170735264.jpg);
    background-position:top center;
    background-size:contain;
    background-repeat: no-repeat;
    font-size: 14px;
    min-width: 1300px;
}
.wrap_1{
    width: 990px;
    margin: 0 auto;
}
.wrap_2{
    width: 1300px;
    margin: 0 auto;
}
.wrap_3{
    width: 1200px;
    margin: 0 auto;
}